-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
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R **ON A/C 401-499,
49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC 52HH D08
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
122VU AIR COND/PACK TEMP/CTL SYS1/2/115VAC 21HH W22 122VU AIR COND/PACK TEMP/CTL SYS1/2/28VDC 23HH W21 122VU AIR COND/PACK TEMP CTL SYS2/2/28VDC 24HH Y21 122VU AIR COND/PACK TEMP CTL SYS2/2/115VAC 22HH Y20
R **ON A/C 401-499,
122VU AIR COND/TEMP CTL SYS 1/CHAN A/115VAC 49HH X22 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 51HH X21 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC 50HH Y18
**ON A/C ALL
Subtask 21-52-25-860-050
B. Aircraft Maintenance Configuration
(1) Make sure that the access panel/s is/are removed (Ref. TASK 53-35-13-000-002).
(a)
FOR 10HM6
-191KB,
(b)
FOR 11HM6
-192KB.
4. Procedure
_________
(Ref. Fig. 401/TASK 21-52-25-991-001) Subtask 21-52-25-420-050
A. Installation of the Primary Heat Exchanger NOTE : It is no longer required that the gaskets (4) and (6) be fitted on
____
installation of the primary heat exchanger.
(1)
Remove the protective covers from the cooling elements of the primary heat exchanger (5) and the main heat exchanger (9).
(2)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(3)
Clean the component interface and/or the adjacent area.
(4)
Put the primary heat exchanger (5) in position on the main heat exchanger (9) and install the washers (7) and the screws (8).
(5)
TORQUE the screws (8) to between 0.35 and 0.45 m.daN (30.97 and 39.82 lbf.in).
(6)
Put the fan plenum (1) in position on the primary heat exchanger (5) and install the washers (3) and the screws (2).
(7)
TORQUE the screws (3) to between 0.35 and 0.45 m.daN (30.97 and 39.82 lbf.in).
(8)
Install the heat exchanger unit (Ref. TASK 21-52-24-400-001).
(9)
Install the ram air outlet (Ref. TASK 21-61-52-400-003).
(10) Install the pipe assembly (Ref. TASK 21-52-23-400-001).
1EFF : ALL 1 21-52-25Page 409 1 1 Aug 01/05R 1 1 1CES 1
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
Subtask 21-52-25-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 10HM6 1HH, 2HH, 3HH, 4HH. FOR 11HM6 21HH, 22HH, 23HH, 24HH.
R **ON A/C 401-499,
Subtask 21-52-25-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 10HM6 49HH, 50HH, 51HH, 52HH. FOR 11HM6 53HH, 54HH, 55HH, 56HH.
**ON A/C ALL
Subtask 21-52-25-710-050
C. Test
(1)
Do the pre-conditioning through the HP ground connector or with the APU (Ref. TASK 12-33-21-618-001) (Ref. TASK 12-33-21-618-001).
(2)
Do a leak check of the primary heat exchanger connections.
NOTE : Minimum leakage is permitted. After the pack operates some
____ minutes, the leakage of air will reduce because the seals have their correct operating temperature.
(3) After approx. 15 minutes stop the pre-conditioning (Ref. TASK 12-33-21-618-001) (Ref. TASK 12-33-21-618-001).
5. Close-up
________ Subtask 21-52-25-410-050
A. Close Access
(1) Install the access panel/s (Ref. TASK 53-35-13-400-002).
(a)
FOR 10HM6
-191KB,
(b)
FOR 11HM6
-192KB. Subtask 21-52-25-862-050
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
HEAT EXCHANGER - MAIN (10HM7,11HM7) - REMOVAL/INSTALLATION
__________________________________________________________
TASK 21-52-26-000-001
Removal of the Main Heat Exchanger 10HM7 (11HM7)
WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
_______
FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
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